I am a 30 year old guy from Sweden studying pharmaceutical manufacturing at a pretty basic level - or, mostly basic, because the course I have now (cell culture; fed batch, continuous batch...) exceeds my knowledge so much that I've been given a completion (I don't know the English word) since I didn't make the big exam. If I pass the completion questions, they'll approve me.
I will try to translate the task that I want help for. It's about cell growth in a chemostat. I hardly know what a chemostat does.
"In continuous cultivation, but also in feedbatch and perfeusion cultivation, you can have a (cell) culture that grows with lower speed than the maximum speed. You have equilibrium between limiting substrate and cell-concentration. Even if there's too many or too few cells, the culture still will have the same cell-concentration after a while. Why? Describe what happens and draw a diagram if you want."
How would you answer that question in the most easy way possible? Why will the culture have the same cell-concentration after a while?
I'm very grateful if some of you can help me!